Change-speed gearing



L: HERMAN AND1?. 5A KARG.

CHANGE SPEED GEI-WINEe APFLICAHOEQ FILED NQVl 26, 1920` atened-Sep. 27?, 41921.

illu W l lila To @ZZ whom r; may concer-n.'

Be it known that we, Lno HERMAN and @FRANK J. Keno, citizens of the 'United States, residing at Akron7 in the county of .Summit and State of (Ehio, have invented certain new and useful improvements in a Changepeed" Gearing, of which the foiiowing is a specification.

rihis invention relates to the class of veriable speed driving mechanisms, and has for one of its objects to Simplify and improve the construct-ion and increase the eiiciency' end utiitjv of devices of this character.

Another object of .she invention is to provide e device ot" this character which may he applied Without .neterial structural change to motor driven vehicles of various forms, and operative by electricity, gasolene,

steam or other power.

Another object. o the invention is to provide a device of this character whereby high or low speed may he transmitted to a n'heei or other moving element troni. a drive shaft hy simply actuating a shifter lever.

TWith these and other objects invien/the invention consists in certain novel features of construction as hereinafter shown and described and lShen specifically pointedout in the clailni and in the drawings iliustrotive of the preferredembodiment of the invention.

Figure 1 is a iongitudinel sectional viewof the improved apparatus. e

Fig'. 2 is n frontelevation of the siidable pinion with the shaft. in section on the `line f-Q of Fig. 1.

The improved device includes a shaft 10 mounted for rotation Within a suitable gear Casin 11. The casing 11 is extended at the ends into tubular portions 12, one only being shovvnf Ait their inner ends the shaft sections 10,

Specification of Letters tatent. Pgggqgned Sept 27', QZL

application filed November 26, i920. Serial No. 426,640.

with keys, indicated at 1'?, to engage in the lreyways. By this means the shaft sections are rigidly attached to the hubs ot' the' di iferential gearing and rotate therewith.

The hub portion ot' a4 main motion transmitting vwheel is represented at 18, and mounted for rotation by suitable roller bezirings 19 upon the tubular member 1Q. EX- tending from the wheel 18 is an annuiar projection 20 having,- e ring gear 21 attached to its inner fece. lidounted on the tubular member 12 enternaiiy of the wheel 18 is e holding member E32, the opening' for the shaft being eccentricaily disposed therein, shown.

A bearing ringengages in shoulder in the member A douhie gear member includingr a body 24., outer gear teeth Q5. and annular .bearing ianges Q6 and 27, is arranged within the ring gear with the iiangre Q6 erigagljingrl over the bearing ring rfhe outer gear teeth Q5 are in constant engagement with the ring gear 2l.

Extending' from the outer face of the member 22 is a projection 2E. and'bearing;l upon the projectioi'i and within the outer flange 27 oi' the double gear 2i, is a holding plate 29 beingr held in place by clamp screws 30 tapped into .the projection :28.

3y this means 'the double ,fleur is held in position for rotation upon the member 31.'

A pinion 31 slidnbly engages the shaft 1() and rotates therewith through 'the medium of internal keys 82 engaging in keywnys 33 in the shaft.

The holding member Q9 is provided with an opening to permit the pinion 31 to pass when shifted.

Attached to the projection 20 of' the Wheel 18, by cap screws or studs Si is n cap or cover member 35 having an internal central socket 36 in which an internal ring gear 37 is secured, the latter adaptedf'to receive an annular 4the pinion 31 when the latter is moved o'utniardly.

At its outer end the shaft 10 is journaled in the Icentre] portion of the member 35, preferably by e suitable ball hearing, as shown, the pinion 31 and gear 37 constituting a ciutch to couple theshaft sections l0' to the Wheel 18, and produce e' direct rotation 'of the Wheel. from thel shaft.

Surrounding' the shaft 1() between the hub of the dif'erentiel gear 14; and the pinion 31, is a sleeve 38 having a channeled collar 39 at one end and outturned at the other end to form a flange to receive rivet devices 40 whereby the sleeve is connected rigidly to the pinion.

Mounted in the cover plate for the casing 11 is a rod 41, and slidable on the rod are shifting brackets 42, one of which is shown, each including a forked )ortion 43 engaging respectivelyv with channeied collars 39.

By this arrangement when the sleeve 38 is disposed in one position, the pinion 31 will be in engagement with the portion of the gear 24 and thus couple the pinions 31 with the gears 24 and thence drive the gear 21 and the wheel 18 and produce the slow speed, and then by shifting the sleeve v38 to its other poeition the inner sleeves are projected in opposite directions and the pinions lwill be coupled to the clutch members 37 and applyr a direct drive to the wheels.

A bearing adjustment nut 44 is preferably disposed between the holding member 22 and the hub ot the wheel 18, as shown.

The improved device will be found very luseful and eiicient especially 1n motor trucks, as the direct drive can be employed when speed is required or when running upon level roads, and the indirect drive employed when greater power is required when moving up grades, or over uneven ground.

The device is simple in cbnstruction, can

'be inexpensively manufactured, and operates efectually for the purposes described.

The preferred embodiment of the inven-f outer sleeve, an outer ring gear carried by 4 the rotative member, a pinion slidable on the shaft, an inner sleeve connected to the pinion, a holding element carried by the outer sleeve, an inner ring gear rotative on the holding element and having outer teeth engagingthe outer ring gear and ihner teeth engaging the pinion when the same is in inner position, a clutch element carried by the rotative member and engaged by the pinion when the inion is in outer position,

and means for s iftin -Lthe inner sleeve to change the position of he pinion.

In testimony whereof, We affix our signatures hereto.

Lilo-v HERMAN. FRANK J.v KARG. 

